The use of force by officers was unwarranted and the case must be investigated, says the organization that collected the petitions.
Officers were ordered not to directly confront protesters who poured red paint on the memorial to fallen officers.
Those protestors are angry about officers from the Denver Police Department shooting and killing 17-year-old Jessica Hernandez.
The department's policy, however, is less restrictive than Aurora's. Two Denver officers shot and killed a 17-year-old girl in a moving car earlier this week.
Laura Sonya Rosales Hernandez said Wednesday that she doesn't trust the police investigation into the Monday shooting of Jessica Hernandez.
Does the city need more stringent restrictions on when police officers can shoot at moving vehicles?
Police shot the teenager Monday at about 6:30 a.m. after they say she struck and injured an officer with a stolen car.
The state's top law enforcement officials gathered for a roundtable discussion today to find ways to ease tension and improve ties between citizens and police.
U.S. Attorney General Eric Holder recently announced new federal policing guidelines intended to end racial profiling. So far, the Denver police department hasn't adopted them.
Denver Mayor Michael Hancock will hold talks Friday on how to improve the relationship between police and minorities.